x=[1,5,3,2,4,6]
print("原列表：",x)
x.reverse()
print("反转后：",x)

a=[5,3,6,1,2,4]
print("原列表：",a)
a.sort()
print("排序后：",a)

a1=[5,3,6,1,2,4]
b=a.sort()
print("b:",b)
print("原列表a1:",a1)
b=sorted(a1)
print("排序后b：",b)
